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Top 33
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Updated weekly · Last refresh Aug 30

L'Oréal Software Engineer Interview Questions

The questions to prepare for a L'Oréal Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

33questions
~5htotal time
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1
System DesignStart here. 3 questions · ~26 min
Scalable Architecture for Product PagesHard
Recently asked

Assesses system design skills for scalability, performance, and reliability under load.

system designscalable architectureL'Oréal
Scalable Inventory System for CosmeticsHard
Recently asked

Assesses system design for low latency and reliability in inventory management at scale.

inventory managementarchitecturemicroservicesL'Oréal
API Integration With ResilienceMedium
Recently asked

Evaluates reliability practices for API integrations, including observability and throttling.

api integrationerror handlingsystem architectureL'Oréal
2
Behavioral & Leadership25 questions · ~213 min
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3
More topics5 questions · ~43 min
Algorithm with Complexity AnalysisEasy
Practice
Recently asked

Find the minimum rooms needed for overlapping Westgate reservations using sorting and a min-heap.

time complexityBasic AlgorithmsAlgorithmsL'Oréal
Prioritize Competing Research DeadlinesEasy
Recently asked

Explain how you prioritize competing research tasks with different deadlines, business impact, and stakeholder needs.

Trade-offsRoadmappingScope ManagementL'Oréal
Indexing for Slow SQL QueriesMedium
Recently asked

Tests your ability to diagnose and improve database performance with indexing.

L'Oréal
AWS Queues and API SecurityHard
Recently asked

Assesses practical experience with AWS messaging and securing API integrations.

awsapi securityL'Oréal
Ensuring Code Quality at ScaleMedium
Recently asked

Tests practices for writing maintainable code in large distributed teams.

code qualitydistributed teamsmaintainabilityL'Oréal

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Sum From 1 to 1,000,000Easy
Practice
Practice drill

Calculate the sum of integers from 1 to 1,000,000 using PostgreSQL aggregation and filtering.

AlgorithmsVirtu Financial
SQL for Student Subject TotalsEasy
Practice
Practice drill

Use a join, SUM, GROUP BY, and HAVING to find students whose combined subject scores exceed 200.

sqlawsAmerican Airlines
Second Highest Trader SalaryEasy
Practice
Practice drill

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSortingeClinicalWorksInformaticaSpectraforce Technologies
The finish line: interview-readyComplete all 33 questions plus 3 hands-on drills to finish this plan.